Hollow-screw elevator.



W. C. ALBERS.

HOLLOW SCREW ELEVATOR.

APPLIGATION FILED APR. 25, 191s.

1,098,420, Patented June 2, 1914.

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COLUMBIA PLANOGRAPH co\vAsHlNaToN. D, l:

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WILLIAM. G. ALlBlERS, 0F NEW YQRK, N. Y.,

trici ASSIGNOR Uli' THREE-FURTHS '10 ADOLPH W. BILLE, DENVER, GOIJORAEO.

HGLLOWClcUilW ELEVATOR.

T0 all 107mm it muy concern:

Be it known that l, llViLLniM C. Annees, a citizen of the United States, residing in New York city, in the county et' llew York and State or New York, have invented eertain new and useful lmprovements in l'lollow-Screw Elevators, ot which the following is a specification.

lli/ly invention enables the construction oli cheap, durable and strong hollow-screw elevators for liquids and granular substances, which will litt the greatest quantity possible with given dimensions and in which the screw is soltormed that it is impossible tor air-traps to `be formed, which impair the eiliciency and restrict the duty of known types of such elevators. p

The principal novel 'features olf my velevator are as lollowst 1. The form of the helix, which is radially inclined so that at all points it aseends from the envelop to the axis, so that the incipient screw adjacent to the axis is everywhere ascending and air traps are physically im possible.

2. The inode olf building the envelop or tube, which is made of exactly similar helical plates rolled or pressed with a slight axial taper and a leading, radially-inclined `flange. The tube is spiral-riveted and has a spiral, lapped tapered joint termed by slipping the following edge ol' one spire over the leading` edge et the preceding one; and an inward stub screw or screw-flange :formed ci the plate-tianges for connection with the helix, and similarly inclined.

3. rlhe mode of connecting' the helix and the axle.

4. The mode oil. joining the helix and envelop.

ln the drawings, lligure l is a side view partly in section and Fig. 2 an axial section showing the preferred detail of the axle.

ln the practice o'l my invention, l set my elevator lll at a suitable angle, preferably titty to seventy degrees with the horizontal, rotatably mount it on a suitable foundation, l, and thrust bearing 2, illustrated as a ballbearing, and provide a suitable heade'lrame 3 and headbearingd, and drive mechanism 5, which may be a frictional or toothed gear train connected with a source of power; and a flume or conduitG to convey the pumped water to its place oit use. Both ends ot the elevator are open and its lower end is Speccaton of Letters Patent.

Application filed April 25, i913.

Patented June 2, 1914.

oerial No. 763,499.

submerged. The envelop or tube made or' exactly similar plates, rolled or pressed into segments of a helix and with a slight axial taper and a leading1 flange 7, radially inclined at an angle slightly greater than the obtuse setting angle of the elevator; and suit-ably punched or drilled ior riveting. rlhe spiral joint is :termed by slipping the following edges ot spirals over the ilanged edges of the preceding ones, so that the' spiral joint is slightly tapered and theplateflanges T torni a continuous radially iwardly inclined stub-screw or helical 'liange Tl upon the inner surface et the tube.

llhe axial joints are riveted single butts with single butt-plates, inside the tube. The helix 8 is lormed of exactly similar plates, rolled or pressed into segments of a radiallyinclined helix, like the upper helical surt'ace of a ll-thread screw, the acute angle oli' radial. inclination with the axis being slightly less than the acute setting angle of the elevator and being the complement of the plated'lange angle, so that when the elevator is assembled the helix 8 will lit the stub screw or helical 4flange 7b. The joints of the helix are single butts with the buttplates beneath it, and all similar. T he axle il carries the head and toot bearings, a head collar 9L and a jack screw thread 9" interior to the l'oot bearing. The helix may be flanged and riveted to the axle, but Vlt prefer the construction illustrated in Fig. 2 which shows in the axle, an incised, rigl1tangled thread 9C with lower and upper surfaces respectively parallel and perpendicular to the radial inclination ot the helix. lVhen the elevator is assembled, the inner edge of the helix 8 lits the'axle thread 9c, the collar 9 contines the helix and a acknut, 9d, on the jack-thread 9" draws against a spider or transverse beams lc built on the tube Vi, and

`pulls the helix 8 into close Contact with the stub screw 7b; and makes tight joints between the helix and the axle and tube.

l provide an outstanding lip or deliver*- llange if around the delivery end of the tube 7 to deliver the water into the flume 6 and on the dry side thereof the drive mechanism 5, preferably a worm gear 5C on the tube 7 and v a worin 5b suitably mounted. on the head frame 3 and connecting the elevator with a suitable motor. rlhe worin gearing prevents the elevator 'trom backing; and it l use other forms of gearing l retain the elevator, when no power is supplied, by a pawl engaging the tube 7. On long elevators, provide one or more intermediate bearings 10, consisting in a suitable cylindrical tread 7g, preferably of channel section, on the tube 10a, and a corresponding cylindrical rail 10b supported by a suitable frame 10c.

l increase the strength of my tubes as beams by axial trusses ll, preferably formed of a strut ring lla and tie-rods l1b attached to the tube 7 adjacent to and extending between supports, tightened by turnbuclrles llc, or otherwise, and bearing on the strutrings, lla, which prevent the local thrusts of the struts from deforming the tube. rlhe strut-rings are preferably formed Vof a pair of matching, flanged, conical plates 11, riveted by their flanges to the tube 7 and riveted together at their apex.

The operation of my elevator when lifting water is as follows: Its lower end is submerged to any convenient depth and the submergence can vary to any extent without interfering with its operation; and it is rotated clockwise if its screw be right-handed,

anti-clockwise if it be left-handed; and such rotation will lift water with no possibility of the formation of air-traps because the helix 8 is everywhere upwardly inclined, and air in, or liberated from the water in the tube, will move against the under side of the helix, toward the axle and the adj acent part of the helix, which forms a continuously ascending helix, with no descending limbs whatever in which air traps might form. This peculiarity is the essence of my invention. It will be observed that adjacent to the tube the helix has descending helical elements on its low side; but its radial inclination is such that from any point its surface ascends radially toward the axle, that as the axle is approached the dip of the helical elements on the low side decreases and vanishes; and the helix ascends radially in every part and helically adjacent to the axle furnishes a free outlet for air. The axle 9 and helix S may be detached and removed from the tube 7 by unscrewing the j ack nut 9d from the axle and the helix from the tube, repaired in the open, and replaced.

Having thus described my invention, 1 claim: Y

l. A hollow-screw elevator adapted to be set with its axis inclined at a determined angle comprising a revoluble inclined tube and a helix in and attached to said tube and radially inclined thereto at an obtuse angle which exceeds the obtuse setting angle of the elevator with the horizontal.

2. A hollow screw elevator adapted to be set with its axis inclined at a determined angle comprising a revoluble inclined tube, and therein an axle and a helix connecting said tube and axle and radially inclined thereto at an obtuse angle which exceeds the obtuse set-ting angle of the elevator with the horizontal.

8. A hollowv screw water elevator adapted to be set with its axis inclined at a deteriined angle and comprising a revoluble tube, an axle extending through and a helix within and radially inclined to said tube and connected with it and said axle, the edge of said helix adjacent to said tube undulating toward and from an assumed horizontal datum plane and the edge thereof adjacent to the axle everywhere ascending relatively to such plane.

4C. A hollow screw elevator comprising a revoluble, inclined tube, a. stub screw on the inside of said tube and within it an axle, a helix connected with said axle and means to traverse the axle and helix axially in the tube and to strain said axle against said helix and said helix against said stub screw.

5. A hollow screw elevator comprising a revoluble, inclined tube, a stub screw on the inside of said tube and within it an axle, a thread in said axle, and a helix fitting said axle-thread and bearing on said stub screw, and means to traverse the axle and helix axially in the tube and to strain said axle against said helix and said helix against said stub screw.

6. A hollow screw elevator comprising a revoluble, inclined tube, a plurality of similar helical plates assembled in said tube, leading flanges on said plates radially inclined thereto at an obtuse angle exceeding the obtuse setting angle of the tube and forming an interior screw-flange on said tube, and a helix radially inclined at a similar angle.

7. A hollow screw elevator comprising a revoluble inclined tube, a plurality of similar helical plates assembled in said tube, leading flanges on said plates radially inclined thereto at an obtuse angle exceeding the obtuse setting angle of the elevator with the horizontal, said plates being formed with a slight taper and adapted to be assembled with a helical riveted lapped joint formed by lapping the following edges of plates over the leading flanged edges of adjacent plates, and a helix radially inclined at the same radial angle as and in contact with the flanges of the tube-plates.

8. A hollow screw elevator comprising a revoluble inclined tube, a helix in said tube, supports for said tube, a strut ring intermediate between said supports, and a series of longitudinal stiening trusses comprising oppositely inclined tie rods connected with said tube adjacent to and extending between said supports and connected with said strut ring.

9. A hollow screw elevator comprising a revoluble, inclined tube, a helix in said tube,

three or more supports for said tube, a strut ring intermediate between every two sup ports, and a series of longitudinal stiiiening trusses comprising oppositely inclined tension rods connected with said tube adjacent to each support and extending between adjacent supports and connected with the inter-mediate strut rino'.

10. A hollow screw elevator comprising a revoluble, inclined tube, a helix in said tube, three or more supports Yfor said tube, a strut ring intermediate between every two supports, a pair of conical plates united with said tube and at their apex and Jtermin g said strut-ring, and a series of longitudinal stitfening trusses comprising oppositely inclined tension rods connected with said tube adjacent to each support and extending between adjacent supports and connected with the intermediate strut ring.

11. A hollow screw elevator comprising a revoluble inclined tube, a helix and an axle within said tube and fastening means adapted to strain the axle against the helix and the helix against the tube and to permit the removal of the helix and axle.

12. A hollow screw elevator comprising a revoluble inclined tube, a helical ange on the inside of said tube, a helix, an axle, a

thread on said axle, and a nut on said thread abutting against a part or' said tube and adapted to draw the helix into engagement with said flange on the tube and to permit the removal as a unit of said helix and axle.

13. A hollowT screw elevator adapted to be set with its axis inclined at a predetermined angle and comprising a revoluble inclined tube, a helix in and attached to said tube and radially inclined thereto at an obtuse angle which exceeds the obtuse set ting angle ort the elevator with the horizontal and combined therewith a gearing adapted to rotate the tube and prevent it from turning backward.

14. A hollow screw elevator adapted to be set with its axis inclined at a predetermined angle and comprising a revoluble inclined tube, a helix in and attached to said tube, and radially inclined thereto at an obtuse angle which exceeds the obtuse setting angle of the elevator with the horizontal, and a trame, and combined therewith a worin gear on the tube, and a worm revolubly mounted on the frame.

WILLIAM C. ALBERS.

Witnesses:

H. D. PENNEY, A. W. HILLE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

